Views produces duplicates when using User Stats as sort criteria

I also have a problem of this.
I tried to figure out what is happening. Maybe it is caused by the count logic.
As I only chose count post, it works fine.
However, if also ticked "count login", duplicated views result will be shown.

Hopes help!

To overcome, you should play with filter - statistic name.
You may output the fields: stat value and stat name to see the outcome.